Engine pulsing under engine breaking in 1st gear

migliore · 10-25-2005, 11:57 AM

Two of us have noticed the same thing, anyone else?

2006 Titan SE CC w/ BT/OR, new (friend)
> So, I'm driving down Pike's Peak this week end and it's a steep dirt
> road near the top. Steep engought that 2nd gear isn't quite slow
> enough, but 1st gear, well I just didn't have THAT much patience. So,
> instead of clicking between 2nd and 1st as I go, straight-a-way,
> hairpin, straight-a-way, hairpin, etc. etc. I leave it in 1st and use
> the gas between hair pins. As I accelerate to around 2500-3000 RPM in
> 1st gear, the truck would surge back and forth like it was cutting gas,
> then giving gas, then cutting, etc.

2005 Titan LE CC w/ BT, 2700 miles (me)
> I had the exact same thing happen to me yesterday and
> starting freaking out and was going to ask you. I was
> hovering around 2500 RPM in first coming down Twin Sisters
> trailhead, and it was pulsing, almost as if the torque
> converter kept locking and unlocking.

I thought my tranny was screwed up until my friend reported the same thing.

Ants05SE · 10-25-2005, 12:06 PM

To me that sounds exactly like my 5-speed Maxima if I try to drive it in 1st gear. If I let off the gas, it kinda feels like it's jerking and if I blip the gas it'll jerk really hard. I'm thinking that's normal in that low of a gear.

kvoman · 10-25-2005, 12:09 PM

Have you tried running it 1st gear and that speed on smooth pavement to see if you're experiencing the same issue with constant throttle?

IQ9 · 10-25-2005, 01:06 PM

Good question

scr38 · 10-25-2005, 01:34 PM

The Titan senses when you are engine braking and shuts off the fuel injectors. That probably is what was happening when you were on and off the throttle.

Old Speed · 10-25-2005, 02:35 PM

yeah my titan seems to do the same by not in 1st it is in all gears just going down hills in general and leaving it in D and not giving it any gas going down hills.

Papa_D · 10-25-2005, 05:30 PM

Quote:

Originally Posted by scr38

The Titan senses when you are engine braking and shuts off the fuel injectors. That probably is what was happening when you were on and off the throttle.

Makes sense but is this true?